If you can find the NHT Absolute Zero on sale for $300/pr, I think it would qualify as "diamond in the rough".
They sound great too.
The NHT Absolute Zero’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures
+0.94/–0.82 decibels from 200 hertz to 10 kilohertz.